WO2019006705A1 - 一种注射器 - Google Patents

一种注射器 Download PDF

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Publication number
WO2019006705A1
WO2019006705A1 PCT/CN2017/091893 CN2017091893W WO2019006705A1 WO 2019006705 A1 WO2019006705 A1 WO 2019006705A1 CN 2017091893 W CN2017091893 W CN 2017091893W WO 2019006705 A1 WO2019006705 A1 WO 2019006705A1
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WO
WIPO (PCT)
Prior art keywords
cavity
diameter
passage
hook
syringe
Prior art date
Application number
PCT/CN2017/091893
Other languages
English (en)
French (fr)
Inventor
罗绍基
张卓旋
Original Assignee
广东海鸥医疗器械股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 广东海鸥医疗器械股份有限公司 filed Critical 广东海鸥医疗器械股份有限公司
Priority to PCT/CN2017/091893 priority Critical patent/WO2019006705A1/zh
Publication of WO2019006705A1 publication Critical patent/WO2019006705A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details

Definitions

  • the invention relates to a syringe.
  • Syringe is a common and used medical device, mainly used for injecting liquid medicine or blood test.
  • the use of disposable sterile syringes has been promoted.
  • the existing disposable sterile syringes remain intact after being used up, and can be reused, which gives some criminals the opportunity to take advantage of the cross-infection and easily spread the disease.
  • the injected syringe is easy to scratch the skin due to the exposure of the needle during the subsequent treatment, resulting in a new cross infection, and the recycling process is cumbersome.
  • the present invention provides the following technical solutions.
  • a syringe that includes:
  • a jacket comprising a receiving cavity
  • a core rod includes a pulling member and a driving rod, the pulling member is located at one end of the driving rod, the driving rod is received in the receiving cavity, and the driving rod is controlled by the pulling member a pushing and pulling movement is performed in the receiving cavity, and the other end end of the driving rod is provided with a first engaging portion;
  • a rubber plug is sleeved on the driving rod of the core rod
  • a needle holder includes a pinhole and a pullback member, one end of the needle seat is sleeved on the outer sleeve, and the pullback member is provided with a second snap portion, and the pinhole passes through the pullback member Communicating with the receiving cavity, when the first engaging portion of the driving rod enters the needle seat, the first engaging portion is engaged with the second engaging portion, and the driving rod is pulled back when the driving rod is retracted. The pieces are pulled together in the recovery cavity;
  • a needle tube disposed in the pinhole, a portion of the needle tube being located in the pinhole and being fixedly coupled with a pullback member, the remaining portion of the needle tube being located outside the pinhole, the needle tube being used for receiving The liquid in the cavity is led out;
  • One of the first latching portion and the second latching portion is a hook with a chamfered corner, and the other is a latching cavity that cooperates with the hook.
  • the first engaging portion is a hook with a chamfer; the second engaging portion is a latching cavity, and the pinhole communicates with the receiving cavity through a latching cavity, and the latching cavity is connected to the receiving cavity
  • the diameter of the interface is smaller than the diameter of the middle of the clamping cavity, so that the hook of the driving rod enters the clamping cavity and is fastened to the chamfer of the hook.
  • the needle hub comprises a first channel and a second channel communicating with each other, the inner surface diameter of the first channel being larger than the inner surface diameter of the second channel;
  • the pullback member includes a first portion and a second portion that are connected to each other, the first portion has a diameter larger than a diameter of the second portion, the first portion is disposed in the first passage, and the second portion is disposed in the first portion In the two passages, the first portion and the second portion are provided with a third passage for engaging the needle tube, and the diameter of the third passage is adapted to the outer diameter of the needle tube;
  • the snap cavity is disposed in the first portion and is in communication with the third passage, the third passage extends through the entire second portion, the end of the second portion protrudes from the first passage, and the third passage is in the second portion
  • the diameter of the end portion gradually becomes larger from the inside to the outside; the outer surface of the end portion of the second portion is provided with a first convex ring, and the outer surface diameter of the first convex ring is larger than the diameter of the inner surface of the second passage.
  • the diameter of the passage opening of the first passage connected to the receiving cavity is smaller than the diameter of the middle of the first passage.
  • the diameter of the passage opening of the second passage communicating with the outside is smaller than the diameter of the middle of the second passage.
  • the connecting portion is connected to the latching cavity at one end, and the other end of the connecting cavity is connected to the third channel.
  • the diameter of the connecting cavity is smaller than the diameter of the latching cavity.
  • first channel and the second channel are connected with a blocking portion.
  • the needle seat is provided with a second convex ring corresponding to the latching cavity of the pullback member.
  • the pullback member includes a connecting portion having a through hole, a second engaging portion, and a transition portion connecting the connecting portion and the second engaging portion, wherein the second engaging portion is a hook with a chamfering.
  • the diameter of the transition section is smaller than the diameter of the bottom of the hook, and the pinhole communicates with the receiving cavity through the connecting section;
  • the first latching portion is a snap slot, and the latching slot is provided with a card corresponding to the socket
  • the opening is open, the width of the snap opening is smaller than the width of the bottom of the hook, and the width of the snap opening is greater than the width of the transition.
  • the top surface of the card slot is provided with a top sheet, the distance between the top sheet and the card opening is smaller than the length of the hook, and the height of the top sheet is greater than the contact between the hook and the top sheet.
  • the distance between the bottom surface of the card slot is such that the hook is biased to one side.
  • the hook is provided with a drainage groove.
  • the hook gradually increases in size from the top to the root thereof, and the root of the hook is connected to the driving rod through a connecting portion, and the diameter of the root of the hook is larger than the diameter of the connecting portion to form a chamfer.
  • the other end of the driving rod is further provided with a third convex ring, a fourth convex ring and a fifth convex ring, and the hook, the third convex ring, the fourth convex ring and the fifth convex ring are The other end portions of the driving rod are sequentially arranged, and the third convex ring, the fourth convex ring, and the fifth convex ring are in close contact with the inner surface of the outer casing.
  • the rubber plug is disposed between the third convex ring and the fourth convex ring.
  • the outer sleeve is provided with a first lug and a second lug, the first lug and the second lug being opposite.
  • the first lug is provided with one or more through holes.
  • the outer surface of the pulling member is provided with a plurality of first anti-slip strips for anti-slip.
  • the driving rod is provided with a plurality of weight reducing grooves.
  • the syringe further comprises:
  • An O-ring is sleeved at the joint of the needle seat and the outer sleeve.
  • the syringe further comprises:
  • a sheath includes a protective cavity, one end of the sheath being fixedly coupled to the hub, the needle for placement within the protective cavity.
  • one end of the sheath is provided with a convex edge.
  • the inner side of the other end of the sheath is provided with a protrusion corresponding to the needle tube.
  • the outer surface of the sheath is provided with a plurality of second anti-slip strips for anti-slip.
  • the first engaging portion of the end portion of the driving rod is engaged with the second engaging portion of the pull-back member of the needle holder, and the first clamping portion is fixed.
  • One of the second and second engaging portions is a hook with a chamfered corner, and the other is a latching cavity that cooperates with the hook, and is clamped and fixed by the chamfer of the hook, and then the drive rod is retracted.
  • the pull-back piece is pulled together into the recovery cavity, and at the same time, because the needle tube and the pull-back piece are fixedly matched, the needle tube is pulled together to recover the cavity, so that the syringe is self-destructed, thereby preventing the secondary use of the syringe and accidentally injuring the person.
  • accidental infection solves the problems of accidental injury, accidental infection and secondary use caused by the exposure of the injection needle in the prior art.
  • FIG. 1 is a schematic view of a syringe provided by an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of a syringe according to an embodiment of the present invention.
  • FIG 3 is a schematic cross-sectional view of a syringe according to an embodiment of the present invention.
  • FIG. 4 is a schematic view of a jacket of a syringe according to an embodiment of the present invention.
  • FIG. 5 is a schematic view of a core rod of a syringe according to an embodiment of the present invention.
  • Figure 6 is a schematic view of a needle holder of a syringe according to an embodiment of the present invention.
  • FIG. 7 is a schematic cross-sectional view of a needle hub of a syringe according to an embodiment of the present invention.
  • FIG. 8 is a schematic view of a pullback member of a syringe according to an embodiment of the present invention.
  • FIG. 9 is a schematic cross-sectional view of a pullback member of a syringe according to an embodiment of the present invention.
  • FIG. 10 is a schematic view of a sheath of a syringe according to an embodiment of the present invention.
  • FIG. 11 is a schematic cross-sectional view of a sheath of a syringe according to an embodiment of the present invention.
  • FIG. 12 is another schematic diagram of a core rod according to an embodiment of the present invention.
  • FIG. 13 is another schematic diagram of the pullback member provided by the embodiment of the present invention.
  • FIG. 14 is a schematic diagram of the cooperation of the core rod and the pullback member provided by the embodiment of the present invention.
  • the syringe of the present invention comprises:
  • a jacket 100 comprising a receiving cavity 110;
  • a core rod 200 includes a pulling member 210 and a driving rod 220.
  • the pulling member 210 is located at one end of the driving rod 220.
  • the driving rod 220 is received in the receiving cavity 110 by the pulling.
  • the member 210 controls the driving rod 220 to perform a push-pull movement in the receiving cavity 110, the other end of the driving rod 220 is provided with a first engaging portion; a hook 230 having a chamfer 231;
  • a rubber plug 500 is sleeved on the driving rod 220 of the core rod 200;
  • a needle holder 700 includes a pinhole 710 and a pullback member 300.
  • One end of the needle holder 700 is sleeved on the outer sleeve 100, and the second clip portion snap chamber 310 is disposed in the pullback member 300.
  • the pinhole 710 is in communication with the receiving cavity 110 through the pullback member 300.
  • a needle tube 600 is disposed in the pinhole 710. A portion of the needle tube 600 is located in the pinhole 710 and is fixedly coupled with the pullback member 300. The remaining portion of the needle tube 600 is located outside the pinhole 710. The needle tube 600 is used to guide the liquid in the receiving cavity 110;
  • One of the first latching portion and the second latching portion is a hook with a chamfered corner, and the other is a latching cavity that cooperates with the hook.
  • the first engaging portion of the end of the driving rod 220 is fixedly connected with the second engaging portion of the pull-back member 300 of the needle holder 700, wherein One of the first engaging portion and the second engaging portion is a hook with a chamfered corner, and the other is a engaging cavity that cooperates with the hook.
  • the chamfer 231 of the hook 230 is engaged with the latching cavity 310.
  • the driving rod 220 is retracted.
  • the pullback member 300 is pulled together into the recovery cavity 110.
  • the needle tube 600 is fixedly engaged with the pullback member 300, the needle tube 600 is pulled together and recovered into the cavity 110, so that the syringe is self-destructed, thereby preventing the syringe from being destroyed.
  • the secondary use, accidental injury and accidental infection solve the problems of accidental injury, accidental infection and secondary use caused by the exposure of the injection needle in the prior art.
  • the first engaging portion is a chamfered hook 230; the second engaging portion is a latching cavity 310, and the pinhole 710 passes through the engaging cavity 310 and the receiving cavity.
  • the diameter of the interface of the card receiving cavity 310 and the receiving cavity 110 is smaller than the diameter of the middle of the latching cavity 310, so that the hook 230 of the driving rod 220 enters the latching cavity 310 and is fastened to the chamfer of the hook 230.
  • the diameter of the interface of the latching cavity 310 and the receiving cavity 110 is smaller than the diameter of the middle of the latching cavity 310, so that the hook 230 of the driving rod 220 enters the latching cavity 310 and is fastened to the chamfer 231 of the hook 230.
  • the pullback member 300 is pulled together into the recovery cavity 110.
  • the needle hub 700 includes a first passage 720 and a second passage 730 that communicate with each other, and an inner surface diameter of the first passage 720 is larger than an inner surface diameter of the second passage 730; the pullback member 300 includes interconnected
  • the first portion 320 and the second portion 330 have a diameter larger than a diameter of the second portion 330, the first portion 320 is disposed in the first passage 720, and the second portion 330 is disposed in the second passage
  • a third channel 340 of the carding needle 600 is disposed, and the diameter of the third channel 340 is adapted to the outer diameter of the needle tube 600;
  • the latching cavity 310 Provided in the first portion 320 and in communication with the third passage 340, the third passage 340 extends through the entire second portion 330, the end of the second portion 330 protruding from the first passage 720, the third passage 340 being The diameter of the end of the second portion 330 gradually increases from the inside to the outside; the end of the second portion 330
  • the pullback member 300 fixes the needle tube 600 through the third passage 340, and the first convex ring 350 of the second portion 330 of the pullback member 300 is disposed outside the first passage 720, and the outer surface diameter is larger than the direct surface of the second passage 730, and can It acts to catch the pullback member 300, and fixes the pullback member 300 and the hub 700.
  • the diameter of the third passage 340 at the end of the second portion 330 gradually increases from the inside to the outside, facilitating the entry of the needle tube 600 into the third passage 340.
  • the diameter of the passage opening of the first passage 720 connected to the receiving cavity 110 is smaller than the diameter of the middle of the first passage 720.
  • the diameter of the passage opening of the first passage 720 and the receiving cavity 110 is slightly smaller than the diameter of the middle of the first passage 720, which can prevent the pullback member 300 from sliding out easily from the passage opening, and the first protruding ring 350 is fixed to the pullback member from both ends. 300.
  • the diameter of the passage opening of the second passage 730 communicating with the outside is smaller than the diameter of the middle of the second passage 730.
  • the first protruding ring 350 is engaged to activate the function of the fixed pullback member 300.
  • the thickness of the passage connecting the outside of the second passage 730 is gradually thickened from the inside to the outside to enhance its fixing force.
  • the first portion 320 is further provided with a connecting cavity 360.
  • One end of the connecting cavity 360 communicates with the latching cavity 310, and the other end of the connecting cavity 360 communicates with the third channel 340.
  • the connecting cavity 360 has a smaller diameter than the latching cavity 310. diameter of.
  • the connecting cavity 360 allows the end of the hook 230 to enter, and when it is retracted, the chamfer 231 of the hook 230 can be fixed to the latching cavity 310.
  • first channel 720 and the second channel 730 are connected with a blocking portion 750.
  • the pullback member 300 is prevented from entering the second passage 730 from the first passage 720 against the pullback member 300, particularly when the drive rod 220 pushes the injection liquid.
  • the needle holder 700 is provided with a second convex ring 740 corresponding to the latching cavity 310 of the pullback member 300.
  • the resistance of the pullback member 300 into the receiving cavity 110 can be controlled by setting the thickness of the rubber layer of the second convex ring 740.
  • the hook 230 is provided with a drain groove 232.
  • the drain rod 232 is disposed on the hook 200 of the core rod 200, which can effectively prevent the discharge of the remaining liquid when the core rod 200 is locked into the pullback member 300, and can also avoid the situation that the needle holder 700 is pushed out due to the liquid cannot be discharged when locked. .
  • the size of the hook 230 is gradually increased from the top to the root thereof, and the root of the hook 230 is connected to the driving rod 220 through a connecting portion 240.
  • the diameter of the root of the hook 230 is larger than the diameter of the connecting portion 240. Corner 231.
  • the other end of the driving rod 220 is further provided with a third convex ring 250, a fourth convex ring 260 and a fifth convex ring 270, the hook 230, the third convex ring 250, and the fourth
  • the convex ring 260 and the fifth convex ring 270 are sequentially arranged from the other end portion of the drive rod 220, and the third convex ring 250, the fourth convex ring 260, and the fifth convex ring 270 are in close contact with the inner surface of the outer casing 100.
  • the plurality of convex rings are in close contact with the inner surface of the outer casing 100 to enhance its airtightness.
  • the rubber plug 500 is disposed between the third convex ring 250 and the fourth convex ring 260. Further, the airtightness is further enhanced, and the position of the fixed core rod 200 can be activated. Especially after the core rod 200 is pulled back, the needle tube 600 follows the position of the core rod 200 completely entering the receiving cavity 110, and fixes the position of the core rod 200 and the needle tube 600 to prevent the position of the core rod 200 and the needle tube 600 from being prevented. The needle tube 600 protrudes.
  • the driving rod 220 is provided with a plurality of weight reducing grooves 280.
  • the outer sleeve 100 is provided with a first lug 120 and a second lug 130 , and the first lug 120 and the second lug 130 are opposite to each other. Easy to take and push.
  • the first lug 120 is provided with one or more through holes 121.
  • the outer surface of the pulling member 210 is provided with a plurality of first anti-slip strips 211 for anti-slip. Increase its friction for easy access.
  • the syringe further includes an O-ring 400 that is sleeved at the junction of the hub 700 and the outer sleeve 100 . Air leakage at the junction of the hub 700 and the outer sleeve 100 is prevented.
  • the syringe further includes a sheath 800 including a protective cavity 810, one end of the sheath 800 and the hub 700 are fixedly connected, and the needle tube 600 is placed in the protective cavity 810 .
  • a sheath 800 including a protective cavity 810, one end of the sheath 800 and the hub 700 are fixedly connected, and the needle tube 600 is placed in the protective cavity 810 .
  • One end of the sheath 800 is provided with a convex edge 820. It is convenient to take, enhance the strength of the end, and enhance the strength of fixing with the outer sleeve 100.
  • the inner side of the other end of the sheath 800 is provided with a protrusion 830 corresponding to the needle tube 600.
  • the needle tube 600 is protected.
  • the outer surface of the sheath 800 is provided with a plurality of second anti-slip strips 840 for anti-slip. Increase the friction, easy to take, easy to separate from the jacket 100.
  • the needle tube 600 is fixed in the pullback member 300, and the injection liquid is pushed by the core rod 200 in the receiving cavity 110, and the pullback member is pushed.
  • the carding cavity 310 in 300 enters the needle cannula 600.
  • the hook 230 at the end of the driving rod 220 is inserted into the latching cavity 310 of the pullback member 300 in the needle holder 700, and is fastened to the latching cavity 310 by the chamfer 231 of the hook 230.
  • the hook 230 is fixedly engaged with the engaging cavity 310, and the pulling back 300 passes through the passage opening of the needle holder 700 and the outer sleeve 100.
  • the passage opening of the needle holder 700 has a certain elasticity, and
  • the pullback member 300 pulls the inside of the recovery cavity 110, and at the same time, because the needle tube 600 and the pullback member 300 are fixed, the needle tube 600 is pulled together and recovered into the cavity 110, so that the syringe is self-destructed, thereby preventing the secondary action of the syringe.
  • the use of accidental wounding and accidental infection solves the problems of accidental injury, accidental infection and secondary use caused by the exposure of the injection needle in the prior art.
  • the hook and the carding cavity can be reversed.
  • the first latching portion is a latching cavity
  • the second latching portion is hooked.
  • the pullback member 300 includes a communication section 371 having a through hole, a second latching portion, and a transition section 372 connecting the connecting section 371 and the second latching portion, the second latching portion being a card having a chamfering angle Hook, the hook may be the same as the hook in the above embodiment, or may be different.
  • the diameter of the transition portion 372 is smaller than the diameter of the bottom of the hook 230.
  • the pinhole 710 communicates with the receiving cavity 110 through the connecting portion 371.
  • the first engaging portion is a snap groove 281, and the engaging slot
  • the corresponding needle base 700 of the 281 is provided with a snap opening 282.
  • the width of the snap opening 282 is smaller than the width of the bottom of the hook 230.
  • the width of the snap opening 282 is greater than the width of the transition section 372.
  • a top piece 283 is disposed on the bottom surface of the engaging groove 281, the distance between the top piece 283 and the engaging opening 282 is smaller than the length of the hook 230, and the height of the top piece 283 is larger than the card.
  • the distance between the contact point of the hook 230 and the top sheet 283 and the bottom surface of the engaging groove 281 causes the hook 230 to be biased to one side.
  • the core rod 200 is provided with a snap groove 281.
  • the card slot 281 is provided with a top sheet.
  • the pullback member 300 is provided with a hook 230.
  • the pullback member 300 When the pullback member 300 is engaged with the core rod 200 engaging slot 281, the top sheet 283 When the pullback member 300 is pushed to one side, when the pullback member 300 is pulled back to the receiving cavity 110 of the outer casing 100, the pullback member 300 and the needle tube 600 form an inverted needle state, so that the needle tube 600 cannot be pushed out of the syringe casing 100 to the original path.

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

一种注射器，其包括：一外套（100），包括一收容腔（110）；一芯杆（200），包括一拉动件（210）和一驱动杆（220），拉动件位于驱动杆的一端端部，驱动杆收容于收容腔内，通过拉动件控制驱动杆在收容腔内进行推拉运动，驱动杆另一端端部设有具有倒角的卡勾（230）；一胶塞（500），套设在芯杆的驱动杆上；一针座（700），包括一针孔（710）和一回拉件（300），针座的一端套设于外套上，回拉件内设有卡接腔（310），针孔通过回拉件的卡接腔与收容腔连通，卡接腔与收容腔连通的接口的直径小于卡接腔中间的直径，使驱动杆的卡勾进入卡接腔后与卡勾的倒角卡接固定，当驱动杆退回时将回拉件一同拉回收容腔内；一针管（600），设置在针孔内。使用后使注射器自毁，从而防止了注射器的二次使用、意外伤人和意外感染。

Description

一种注射器 技术领域
本发明涉及一种注射器。
背景技术
注射器是一种常见的、使用量比较多的医疗器具，主要用于注射药液或抽血检验等。近年来为了避免反复使用和交叉感染，以推广使用一次性无菌注射器。但是现有的一次性无菌注射器用完后还保持完好，可以重复使用，这就给一些不法分子有机可乘，带来了交叉感染的隐患，容易引起疾病传播。另外，注射完的注射器，在随后的处理过程中，由于针头暴露在外，容易划伤皮肤，造成新的交叉感染，同时回收处理繁琐。
发明内容
本发明的目的在于提供一种安全性能好的注射器。
为解决上述问题，本发明提供如下技术方案。
提供了一种注射器，其包括：
一外套，包括一收容腔；
一芯杆，包括一拉动件和一驱动杆，所述拉动件位于所述驱动杆的一端端部，所述驱动杆收容于所述收容腔内，通过所述拉动件控制驱动杆在所述收容腔内进行推拉运动，所述驱动杆另一端端部设有第一卡接部；
一胶塞，套设在所述芯杆的驱动杆上；
一针座，包括一针孔和一回拉件，所述针座的一端套设于所述外套上，所述回拉件内设有第二卡接部，所述针孔通过回拉件与所述收容腔连通，当所述驱动杆的第一卡接部进入针座后，所述第一卡接部与第二卡接部卡接固定，使所述驱动杆退回时将回拉件一同拉回收容腔内；
一针管，设置在所述针孔内，所述针管的一部分位于所述针孔内并与回拉件配合固定，所述针管的其余部分位于所述针孔外部，所述针管用于将收容腔内的液体导出；
其中所述第一卡接部和第二卡接部其中一个为具有倒角的卡勾，另一个为与卡勾配合的卡接腔。
其中，所述第一卡接部为具有倒角的卡勾；所述第二卡接部为卡接腔，所述针孔通过卡接腔与所述收容腔连通，所述卡接腔与收容腔连通的接口的直径小于卡接腔中间的直径，使驱动杆的卡勾进入卡接腔后与卡勾的倒角卡接固定。
其中，所述针座包括相互连通第一通道和第二通道，所述第一通道的内表面直径大于所述第二通道的内表面直径；
所述回拉件包括相互连接的第一部分和第二部分，所述第一部分的直径大于所述第二部分的直径，所述第一部分设置在第一通道内，所述第二部分设置在第二通道内，所述第一部分和第二部分内设有卡接针管的第三通道，所述第三通道的直径和所述针管的外径相适应；
所述卡接腔设置在第一部分内，并与第三通道连通，所述第三通道贯穿整个第二部分，所述第二部分的端部突出第一通道，所述第三通道在第二部分的端部的直径从内到外逐渐变大；所述第二部分的端部的外表面设有第一凸环，所述第一凸环的外表面直径大于第二通道内表面的直径。
其中，所述第一通道与收容腔连接的通道口直径小于第一通道中间的直径。
其中，所述第二通道的连通外部的通道口直径小于第二通道中间的直径。
其中，所述第一部分内还设有连接腔，所述连接腔一端连通卡接腔，所述连接腔另一端连通第三通道，所述连接腔的直径小于卡接腔的直径。
其中，所述第一通道和第二通道连接处设有阻挡部。
其中，所述针座对应回拉件的卡接腔设有第二凸环。
其中，所述回拉件包括具有通孔的连通段、第二卡接部、以及连接连通段和第二卡接部的过渡段，所述第二卡接部为具有倒角的卡勾，所述过渡段的直径小于卡勾底部的直径，所述针孔通过连通段与所述收容腔连通；所述第一卡接部为卡接槽，所述卡接槽对应针座设有卡接开口，所述卡接开口的宽度小于卡勾底部的宽度，所述卡接开口的宽度大于过渡段的宽度。
其中，所述卡接槽底面上内设有顶片，所述顶片与所述卡接开口的距离小于卡勾的长度，所述顶片的高度大于所述卡勾和顶片接触处与卡接槽底面的距离，使卡勾偏向一侧。
其中，所述卡勾上设有排水槽。
其中，所述卡勾从其顶部至其根部的大小逐渐增大，所述卡勾根部与驱动杆通过连接部连接，所述卡勾根部直径大于连接部直径形成倒角。
其中，所述驱动杆的另一端端部还设置有第三凸环、第四凸环和第五凸环，所述卡勾、第三凸环、第四凸环和第五凸环从所述驱动杆的另一端端部依次排列，所述第三凸环、第四凸环和第五凸环与外套内表面紧密接触。
其中，所述胶塞设置在第三凸环和第四凸环之间。
其中，所述外套设置第一凸耳和第二凸耳，所述第一凸耳和所述第二凸耳相对。
其中，所述第一凸耳上设置有一个或多个通孔。
其中，所述拉动件外表面设置有多条用于防滑的第一防滑条。
其中，所述驱动杆设置有多个减重槽。
其中，所述注射器还包括：
一O型圈，套设于所述针座与外套连接处。
其中，所述注射器还包括：
一护套，包括保护腔，所述护套的一端和针座固定连接，所述针管用于放置于所述保护腔内。
其中，所述护套的一端设置有凸边。
其中，所述护套的另一端内侧对应针管设有凸块。
其中，所述护套的外表面设置有多个用于防滑的第二防滑条。
本发明提供的注射器，利用驱动杆的推动将注射液推射出去后，驱动杆端部的第一卡接部与针座内回拉件的第二卡接部卡接固定，第一卡接部和第二卡接部其中一个为具有倒角的卡勾，另一个为与卡勾配合的卡接腔，利用卡勾的倒角与卡接腔卡接固定，此时，再将驱动杆退回时，则将回拉件一同拉回收容腔内，同时因为针管与回拉件固定配合，则针管一同被拉回收容腔内，使注射器自毁，从而防止了注射器的二次使用、意外伤人和意外感染，解决了现有技术中因注射针外露导致的意外伤人、意外感染和二次使用的问题。
附图说明
为了更清楚地说明本发明的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以从这些附图获得其他的附图。
图l是本发明实施例提供的注射器的示意图。
图2是本发明实施例提供的注射器的分解示意图。
图3是本发明实施例提供的注射器的剖面示意图。
图4是本发明实施例提供的注射器的外套示意图。
图5是本发明实施例提供的注射器的芯杆示意图。
图6是本发明实施例提供的注射器的针座示意图。
图7是本发明实施例提供的注射器的针座剖面示意图。
图8是本发明实施例提供的注射器的回拉件示意图。
图9是本发明实施例提供的注射器的回拉件剖面示意图。
图10是本发明实施例提供的注射器的护套示意图。
图11是本发明实施例提供的注射器的护套剖面示意图。
图12是本发明实施例提供的芯杆的另一示意图。
图13是本发明实施例提供的回拉件另一示意图。
图14是本发明实施例提供的芯杆和回拉件配合示意图。
具体实施方式
下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述。
请参考图1至图11，本发明的注射器，其包括：
一外套100，包括一收容腔110；
一芯杆200，包括一拉动件210和一驱动杆220，所述拉动件210位于所述驱动杆220的一端端部，所述驱动杆220收容于所述收容腔110内，通过所述拉动件210控制驱动杆220在所述收容腔110内进行推拉运动，所述驱动杆220另一端端部设有第一卡接部；具有倒角231的卡勾230；
一胶塞500，套设在所述芯杆200的驱动杆220上；
一针座700，包括一针孔710和一回拉件300，所述针座700的一端套设于所述外套100上，所述回拉件300内设有第二卡接部卡接腔310，所述针孔710通过回拉件300与所述收容腔110连通，当所述驱动杆220的第一卡接部进入针座700后，所述第一卡接部与第二卡接部卡接固定，使所述驱动杆220退回时将回拉件300一同拉回收容腔110内；
一针管600，设置在所述针孔710内，所述针管600的一部分位于所述针孔710内并与回拉件300配合固定，所述针管600的其余部分位于所述针孔710外部，所述针管600用于将收容腔110内的液体导出；
其中所述第一卡接部和第二卡接部其中一个为具有倒角的卡勾，另一个为与卡勾配合的卡接腔。
本实施例的注射器，利用驱动杆220的推动将注射液推射出去后，驱动杆220端部的第一卡接部与针座700内回拉件300的第二卡接部固定连接，其中所述第一卡接部和第二卡接部其中一个为具有倒角的卡勾，另一个为与卡勾配合的卡接腔。利用卡勾230的倒角231与卡接腔310卡接固定，此时，再将驱动杆220退 回时，则将回拉件300一同拉回收容腔110内，同时因为针管600与回拉件300固定配合，则针管600一同被拉回收容腔110内，使注射器自毁，从而防止了注射器的二次使用、意外伤人和意外感染，解决了现有技术中因注射针外露导致的意外伤人、意外感染和二次使用的问题。
请参考图6至图9，所述第一卡接部为具有倒角的卡勾230；所述第二卡接部为卡接腔310，所述针孔710通过卡接腔310与所述收容腔110连通，所述卡接腔310与收容腔110连通的接口的直径小于卡接腔310中间的直径，使驱动杆220的卡勾230进入卡接腔310后与卡勾230的倒角卡接固定。所述卡接腔310与收容腔110连通的接口的直径小于卡接腔310中间的直径，使驱动杆220的卡勾230进入卡接腔310后与卡勾230的倒角231卡接固定，当驱动杆220退回时将回拉件300一同拉回收容腔110内。
所述针座700包括相互连通第一通道720和第二通道730，所述第一通道720的内表面直径大于所述第二通道730的内表面直径；所述回拉件300包括相互连接的第一部分320和第二部分330，所述第一部分320的直径大于所述第二部分330的直径，所述第一部分320设置在第一通道720内，所述第二部分330设置在第二通道730内，所述第一部分320和第二部分330内设有卡接针管600的第三通道340，所述第三通道340的直径和所述针管600的外径相适应；所述卡接腔310设置在第一部分320内，并与第三通道340连通，所述第三通道340贯穿整个第二部分330，所述第二部分330的端部突出第一通道720，所述第三通道340在第二部分330的端部的直径从内到外逐渐变大；所述第二部分330的端部 的外表面设有第一凸环350，所述第一凸环350的外表面直径大于第二通道730内表面的直径。
回拉件300通过第三通道340固定针管600，回拉件300第二部分330的第一凸环350设置在第一通道720外，而且外表面直径大于第二通道730内表面的直接，能够起到卡住回拉件300的作用，使回拉件300和针座700固定。第三通道340在第二部分330的端部的直径从内到外逐渐变大，方便针管600进入第三通道340。
进一步的，所述第一通道720与收容腔110连接的通道口直径小于第一通道720中间的直径。第一通道720与收容腔110连接的通道口直径略小于第一通道720中间的直径，能够防止回拉件300从该通道口轻易滑出，配合第一凸环350从两端固定回拉件300。
进一步的，所述第二通道730的连通外部的通道口直径小于第二通道730中间的直径。配合第一凸环350，启动固定回拉件300的作用。第二通道730的连通外部的通道的厚度从内到外逐渐变厚，增强其固定力。
其中，所述第一部分320内还设有连接腔360，所述连接腔360一端连通卡接腔310，所述连接腔360另一端连通第三通道340，所述连接腔360的直径小于卡接腔310的直径。
连接腔360可以让卡勾230的端部进入，而后退回的时候，卡勾230的倒角231能够与卡接腔310固定。
其中，所述第一通道720和第二通道730连接处设有阻挡部750。
抵住回拉件300，尤其是驱动杆220推射注射液的时候，不会使回拉件300从第一通道720进入第二通道730。
其中，所述针座700对应回拉件300的卡接腔310设有第二凸环740。
可以通过设置第二凸环740的胶层厚度来控制回拉件300进入收容腔110的阻力。
进一步的，所述卡勾230上设有排水槽232。芯杆200卡勾230上设置有排水槽232，可以有效避免芯杆200锁入回拉件300时剩余液体的排出，还可以避免由于锁入时液体不能排出而导致针座700推出的情况发生。
进一步的，所述卡勾230从其顶部至其根部的大小逐渐增大，所述卡勾230根部与驱动杆220通过连接部240连接，所述卡勾230根部直径大于连接部240直径形成倒角231。
请参考图5，所述驱动杆220的另一端端部还设置有第三凸环250、第四凸环260和第五凸环270，所述卡勾230、第三凸环250、第四凸环260和第五凸环270从所述驱动杆220的另一端端部依次排列，所述第三凸环250、第四凸环260和第五凸环270与外套100内表面紧密接触。多个凸环与外套100内表面紧密接触，增强其气密性。
所述胶塞500设置在第三凸环250和第四凸环260之间。进一步加强其气密性，并能启动固定芯杆200的位置，特别是芯杆200拉回后，针管600跟随芯杆200完全进入收容腔110后，固定芯杆200和针管600的位置，防止针管600突出。
进一步的，所述驱动杆220设置有多个减重槽280。
请参考图4，所述外套100设置第一凸耳120和第二凸耳130，所述第一凸耳120和所述第二凸耳130相对。方便拿取和推射。其中，所述第一凸耳120上设置有一个或多个通孔121。其中，所述拉动件210外表面设置有多条用于防滑的第一防滑条211。增大其摩擦力，方便拿取。
请参考图10和图11，所述注射器还包括一O型圈400，该O型圈400套设于所述针座700与外套100连接处。防止针座700与外套100连接处的漏气。
进一步的，所述注射器还包括一护套800，该护套800包括保护腔810，所述护套800的一端和针座700固定连接，所述针管600用于放置于所述保护腔810内。用于保护针管600。所述护套800的一端设置有凸边820。方便拿取，增强端部的强度，增强与外套100固定的强度。所述护套800的另一端内侧对应针管600设有凸块830。保护针管600。所述护套800的外表面设置有多个用于防滑的第二防滑条840。增大摩擦力，方便拿取，方便与外套100分离。护套800内还有固定卡环850用于与外套100卡接固定。
因本实施例的注射器在注射前，回拉件300卡接固定在针座700内，针管600固定在回拉件300内，注射液在收容腔110内被芯杆200推动，经回拉件300内的卡接腔310进入针管600。注射器在注射完后，驱动杆220端部的卡勾230卡入针座700内回拉件300的卡接腔310内，利用卡勾230的倒角231与卡接腔310卡接固定。此时，再将驱动杆220退回时，卡勾230与卡接腔310卡接固定，回拉件300通过针座700的与外套100的通道口，针座700的通道口具有一定的弹性，将回拉件300拉回收容腔110内，同时因为针管600与回拉件300固定，则针管600一同被拉回收容腔110内，使注射器自毁，从而防止了注射器的二次使 用、意外伤人和意外感染，解决了现有技术中因注射针外露导致的意外伤人、意外感染和二次使用的问题。
请参考图12至图14，可以将卡勾和卡接腔对调设置，具体的，第一卡接部为卡接腔，第二卡接部位卡勾。所述回拉件300包括具有通孔的连通段371、第二卡接部、以及连接连通段371和第二卡接部的过渡段372，所述第二卡接部为具有倒角的卡勾，该卡勾可以与上述实施方式中的卡勾一样，也可以不一样。所述过渡段372的直径小于卡勾230底部的直径，所述针孔710通过连通段371与所述收容腔110连通；所述第一卡接部为卡接槽281，所述卡接槽281对应针座700设有卡接开口282，所述卡接开口282的宽度小于卡勾230底部的宽度，所述卡接开口282的宽度大于过渡段372的宽度。
进一步的，所述卡接槽281底面上内设有顶片283，所述顶片283与所述卡接开口282的距离小于卡勾230的长度，所述顶片283的高度大于所述卡勾230和顶片283接触处与卡接槽281底面的距离，使卡勾230偏向一侧。芯杆200设有卡接槽281，卡接槽281内部设有顶片，回拉件300设有卡勾230，当回拉件300与芯杆200卡接槽281扣合后，顶片283将回拉件300顶向一侧，当回拉件300被拉回外套100收容腔110后，回拉件300及针管600形成倒针状态，使针管600不能向原路径被推出针筒外套100。
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。

Claims (20)

  1. 一种注射器，其包括：
    一外套，包括一收容腔；
    一芯杆，包括一拉动件和一驱动杆，所述拉动件位于所述驱动杆的一端端部，所述驱动杆收容于所述收容腔内，通过所述拉动件控制驱动杆在所述收容腔内进行推拉运动，所述驱动杆另一端端部设有第一卡接部；
    一胶塞，套设在所述芯杆的驱动杆上；
    一针座，包括一针孔和一回拉件，所述针座的一端套设于所述外套上，所述回拉件内设有第二卡接部，所述针孔通过回拉件与所述收容腔连通，当所述驱动杆的第一卡接部进入针座后，所述第一卡接部与第二卡接部卡接固定，使所述驱动杆退回时将回拉件一同拉回收容腔内；
    一针管，设置在所述针孔内，所述针管的一部分位于所述针孔内并与回拉件配合固定，所述针管的其余部分位于所述针孔外部，所述针管用于将收容腔内的液体导出；
    其中所述第一卡接部和第二卡接部其中一个为具有倒角的卡勾，另一个为与卡勾配合的卡接腔。
  2. 根据权利要求1所述的注射器，其中，所述第一卡接部为具有倒角的卡勾；所述第二卡接部为卡接腔，所述针孔通过卡接腔与所述收容腔连通，所述卡接腔与收容腔连通的接口的直径小于卡接腔中间的直径，使驱动杆的卡勾进入卡接腔后与卡勾的倒角卡接固定。
  3. 根据权利要求2所述的注射器，其中，所述针座包括相互连通第一通道和第二通道，所述第一通道的内表面直径大于所述第二通道的内表面直径；所述回拉件包括相互连接的第一部分和第二部分，所述第一部分的直径大于所述第二部分的直径，所述第一部分设置在第一通道内，所述第二部分设置在第二通道内，所述第一部分和第二部分内设有卡接针管的第三通道，所述第三通道的直径和所述针管的外径相适应；所述卡接腔设置在第一部分内，并与第三通道连通，所述第三通道贯穿整个第二部分，所述第二部分的端部突出第一通道，所述第三通道在第二部分的端部的直径从内到外逐渐变大；所述第二部分的端部的外表面设有第一凸环，所述第一凸环的外表面直径大于第二通道内表面的 直径。
  4. 根据权利要求3所述的注射器，其中，所述第一通道与收容腔连接的通道口直径小于第一通道中间的直径。
  5. 根据权利要求3所述的注射器，其中，所述第二通道的连通外部的通道口直径小于第二通道中间的直径。
  6. 根据权利要求3所述的注射器，其中，所述第一部分内还设有连接腔，所述连接腔一端连通卡接腔，所述连接腔另一端连通第三通道，所述连接腔的直径小于卡接腔的直径。
  7. 根据权利要求3所述的注射器，其中，所述第一通道和第二通道连接处设有阻挡部。
  8. 根据权利要求2所述的注射器，其中，所述针座对应回拉件的卡接腔设有第二凸环。
  9. 根据权利要求1所述的注射器，其中，所述回拉件包括具有通孔的连通段、第二卡接部、以及连接连通段和第二卡接部的过渡段，所述第二卡接部为具有倒角的卡勾，所述过渡段的直径小于卡勾底部的直径，所述针孔通过连通段与所述收容腔连通；所述第一卡接部为卡接槽，所述卡接槽对应针座设有卡接开口，所述卡接开口的宽度小于卡勾底部的宽度，所述卡接开口的宽度大于过渡段的宽度。
  10. 根据权利要求9所述的注射器，其中，所述卡接槽底面上内设有顶片，所述顶片与所述卡接开口的距离小于卡勾的长度，所述顶片的高度大于所述卡勾和顶片接触处与卡接槽底面的距离，使卡勾偏向一侧。
  11. 根据权利要求1所述的注射器，其中，所述卡勾上设有排水槽。
  12. 根据权利要求1所述的注射器，其中，所述卡勾从其顶部至其根部的大小逐渐增大，所述卡勾根部与驱动杆通过连接部连接，所述卡勾根部直径大于连接部直径形成倒角。
  13. 根据权利要求1所述的注射器，其中，所述驱动杆的另一端端部还设置有第三凸环、第四凸环和第五凸环，所述卡勾、第三凸环、第四凸环和第五凸环从所述驱动杆的另一端端部依次排列，所述第三凸环、第四凸环和第五凸环与外套内表面紧密接触。
  14. 根据权利要求13所述的注射器，其中，所述胶塞设置在第三凸环和第四凸环之间。
  15. 根据权利要求1所述的注射器，其中，所述外套设置第一凸耳和第二凸耳，所述第一凸耳和所述第二凸耳相对。
  16. 根据权利要求1所述的注射器，其中，所述拉动件外表面设置有多条用于防滑的第一防滑条。
  17. 根据权利要求1所述的注射器，其中，所述驱动杆设置有多个减重槽。
  18. 根据权利要求1所述的注射器，其中，所述注射器还包括：
    一O型圈，套设于所述针座与外套连接处。
  19. 根据权利要求1所述的注射器，其中，所述注射器还包括：
    一护套，包括保护腔，所述护套的一端和针座固定连接，所述针管用于放置于所述保护腔内。
  20. 根据权利要求19所述的注射器，其中，所述护套的一端设置有凸边，所述护套的另一端内侧对应针管设有凸块。
PCT/CN2017/091893 2017-07-05 2017-07-05 一种注射器 WO2019006705A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7066906B2 (en) * 2002-05-10 2006-06-27 Ming-Jeng Shue Disposable syringe
CN2808184Y (zh) * 2005-01-10 2006-08-23 邹纯平 自毁式安全注射器
CN200957234Y (zh) * 2006-08-07 2007-10-10 陈昌慈 安全注射装置
CN200966819Y (zh) * 2006-09-25 2007-10-31 罗绍基 弹簧式安全自毁注射器
CN202724383U (zh) * 2012-07-30 2013-02-13 山东淄博山川医用器材有限公司 一次性安全自毁式注射器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7066906B2 (en) * 2002-05-10 2006-06-27 Ming-Jeng Shue Disposable syringe
CN2808184Y (zh) * 2005-01-10 2006-08-23 邹纯平 自毁式安全注射器
CN200957234Y (zh) * 2006-08-07 2007-10-10 陈昌慈 安全注射装置
CN200966819Y (zh) * 2006-09-25 2007-10-31 罗绍基 弹簧式安全自毁注射器
CN202724383U (zh) * 2012-07-30 2013-02-13 山东淄博山川医用器材有限公司 一次性安全自毁式注射器

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